Hypodermic needle.



G. G. POWERS. HYPooERMlc NEEDLE.

1 APPLICATION FILED NOV. 22, i916. 1,217,630. Petented Feb.27,1917.

e, /HWM f m: Nunms rzrsns ca. Nam-Uma.. wAsmNcmN. n. cy

GEORGE Gr. POWERS, 0F LOS ANGELE'CALIFRNIA.:

HYPODERMIC NEEDLE.

Specification of Letters Patent.

' Patented Feo-27, A1917.

Application filed November 22, 1913.l Serial No; 132,781.

To all 'whom z may Concern:

Be it known that I, GEORGE Gr. Pownns, a citizen of the United States, residing at Los Angeles, in the county of Los Angeles, State of California, have invented new. and useful Improvements in Hypodermic Needles, of which the following is a speci# fication.

This invention relates to hypodermic syringes andl the like; and particularly to hypodermic needles and the combination including the needle and other parts of the syringe. And it is included within the objects of this invention to provide a construction including a double ended reversible needle; to provide an effective and simple mounting for the needle; and to provide a compact and efficientcombination of. needle, syringe barrel or cylinder, andpiston.

I describe a preferred form of syringe embodying my invention, and illustrate the same in the accompanying drawings, in which: Figure 1 isa section showing my improvement; Fig. 2 is an enlarged `section showing the needle mounting; Fig. l3 is an enlarged section showing the needle and its mounting collar alone; and Figs. 4 and 5 are sections showing modified needle mountings.'

In the drawings the numeral 10 designates a cylinder or barrel, which may be of any desired size, configuration and design. In the form of apparatus here illustrated, this cylinder or barrel is of comparatively small diameter and is provided with a plunger piston 11, which has a central longitudinal bore 12. A handle 13 is mounted upon the end of the plunger, and handles 14 are mounted upon the barrel, for purposes of manipulation. The plunger or barrel, or

both, may be provided with the usual measuring marks; and may otherwise be conformed and arrangedv kin any usual manner.

At the end of the barrelv I provide a head member l5 which is screw threaded at 16 into the barrel; a suitable washer 17 being provided inside the head as a limit stop to the movement of the plunger. A fluid-tight gasket or washer 17a is provided between the end of the barrel and the flange 1S of the head; and the exterior surface of the head may be knurled or otherwise suited for manual engagement and rotation, as illustrated at 19. The headvhas a projecting screw-threaded nipple 2O upon which the cap 21 screw-threadedly engages. This cap 2l is internally screw-threaded and has a recess 22 below the screw-threads adapted to receive the mounting collar 23 of the `needle 24. lThe construction of this mounting collar is most clearly shown in Fig. 3.Y I show a needle 24 of any suitable type, having-an internal bore, and open at both its opposite ends. The mounting collar 23 comprises an outside ring or ferrule 25 of relatively hard unyielding metal, and an'interior filling 26 of relatively soft yielding metal, such as lead or'lead alloy. This filling may be packed, pounded or 'pressed into the ring 25 around theneedle, withoutthe necessity of melting the filling and pouring it into the case, thus obviatin-g "any liability of destroying the tightly around theiilling. I prefer to make Y the `filling of three pieces of soft metal; a ringA piece 261l having its ends conically recessed, and two conical pieces 2Gb fitting into the conical recesses. The whole is pressed together endwise in a suitable press, etc.; and the exterior of the needle may be serrated or otherwise roughened at 24a to provide a good holding surface. When the mounting collar is in position, as shown in Fig. 2, the end 20EL of nipple 20 presses against one end of the filling, without pressing against the hard metal vring`25', and the bottom 22a of the recess 22V in the cap also presses against the filling7 preferably without pressing against the ring 25.` Bythis means the filling is compressed longitudinally, thus expanding the filling against the hardrmetal' ring and contracting it around the needleyso'astoholdfth'e needle tightly in place and make a fliiid-tightv joint between the soft metal and the-needle. At the same time, the part 2()a makes a fluid tight joint with the soft metal of the filling.

The head member 15 has an internal bore 15a through which the needle extends, and the cap 21 has an interanal bore 21@l in which the needle fits more or less snugly; the cap extending in conical formation, so as to support the needle. In this regard it may be said that the end of the cap may be of any desired configuration or character, so as to enlarged so as to facilitate the passage of the Y needle through they bore.

In practice I preferably place the mounting collar 23 on the middle portions of the needle, and, in some instances at least, nearer one end of the needle than the other; so that the needle may be reversed to provide either' the long or short projecting part. In either case, the unused end of the needle projects back into the barrel .and into the bore l2 fof the plunge In this manner I provide for the accommodation of a very long needleto bc eX- posed and used only when desired; and maire this accommodation without making the barrel or plunger -eXcessiv-.ely long. rIlle long end of .the needle may be, if desired, as long as the interior bore 12 of the plunger. There is a further advantage in having the needle project into the barrel; in that any foreign solid matter which would clog the needle (under the great pressure used) stops at its entry at the inner end of the needle, where it may be readily removed. And, furthermore, the inner end of the needle is quite removed from the lower end of the ba-rrel, at which lower end any foreign solid matter tends to collect.

rIhe needle mounting is a feature :to which I particularly call attention. It will be noted that the mounting collar 23 is, to all practical intents and purposes, a permanent part of the'needle; lalthough it may be removed from the needle, or moved longitudinally thereon, without much trouble. rIhis particular' mounting may be used in other forms of syringes. I have already stated that the end of cap 2l. may be of any desired configuration; and another' typical configuration of this cap is illustrated in Fig. 4, where the end portion 2lb of the cap is curved, and holds the needle in curved configuration, rather than straight. In Fig. 5 I have shown a construction in which the nipple `2O is eX- tended, as shown at 20h, and curved, so as to hold the needle pointing transversely to the length of the barrel.

Although I have described my device in some detail, I do not thereby limit my invention to the specific forms set forth. Modifications and variations (of which the de-v scribed modified forms are typical) may be made within the scope of the claims without exceeding my invention.

Having described al preferred form of my invention, I claim: A

l. In a device of the character described, a barrel, -a hollow piston therein, and a hollow needle mounted on the end of the barrel and vprojecting inwardly into the barrel and into the hollow piston.

2. In a device of the character described, a barrel, a hollow piston therein, a hollow needle having a mounting collar on its middle portion, and means at the yend .of the barrel for holding the needle by clamping its collar., one end of the needle projecting into the barrel .and into the hollow piston.

3. In .a device of the character described, a hell-.ow needle, and a mounting collar therefor embodying .an exterior ring of relatively hard metal and a core of relatively soft metal surrounding the needle and within the rin-g.

4L. Mounting means for a hypodermic needle or the like, embodying a mounting collar on the needle comprising an exterior ring of relatively har-d metal and a core of relatively soft metal around the needle with in the ring., and a needle holder embodying tw-o members screw-threadedly engaging each :other and adapted :to press oppositely against the ends of th-e soft metal of the needle collar.

5. vIn a device of the character described, a barrel, a hollow piston therein, a needle holder on the end of the barrel comprising a member forming a barrel head and a cap screw-threaded on said member, a needle extending longitudinally throu-gh the said member and said cap and projecting into the barrel and into the hollow piston, a mountcollar on the needle held between the said member .and cap, said collar embodying an outer ring of relati\f'ely hard metal and an inner filling of relatively soft metal, the soft metal filling being held and compressed longitudinally between Ysaid member and said cap. Y

In witness that I claim the foregoing I have hereunto subscribed my name this 17th day of November 1916.

GEO. G. PUWERS. lVitnesses ELwoon H. BARKELEW, VIRGINIA BERINGER.

Gomes of this patent may be obtained for ve cents each, by addressing the Commissioner -nf Patents. Washington, D. C. 

